diff --git a/Dockerfile b/Dockerfile
index 85a7efe..515aec1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ RUN set -ex; \
     go mod vendor; \
     go install;
 
-FROM mwalbeck/composer:1.10.22-php7.4@sha256:15f35f1b4bcd0d53f040aa7e1ba21ea2c7d20c77448a01557446acc6ccb5531e AS composer
+FROM mwalbeck/composer:1.10.22-php7.4@sha256:b85fbe275be24a2c7a39dc5535669b1e85d2c9a1a5e42538c5aa428d423debe4 AS composer
 
 ENV FLOX_VERSION master